path: root/tools/testing/selftests/cgroup/cgroup_util.c
diff options
authorClaudio <claudiozumbo@gmail.com>2018-07-18 19:33:58 +0200
committerShuah Khan (Samsung OSG) <shuah@kernel.org>2018-08-09 09:12:45 -0600
commitd863cb03fc5f913c98a9c5d7ecb66fb4a3b29bae (patch)
tree10cfe9b1a698196daefaf05d9297efd47daecba1 /tools/testing/selftests/cgroup/cgroup_util.c
parentselftests: vDSO - fix to return KSFT_SKIP when test couldn't be run (diff)
Add cgroup core selftests
This commit adds tests for some of the core functionalities of cgroups v2. The commit adds tests for some core principles of croup V2 API: - test_cgcore_internal_process_constraint Tests internal process constraint. You can't add a pid to a domain parent if a controller is enabled. - test_cgcore_top_down_constraint_enable Tests that you can't enable a controller on a child if it's not enabled on the parent. - test_cgcore_top_down_constraint_disable Tests that you can't disable a controller on a parent if it's enabled in a child. - test_cgcore_no_internal_process_constraint_on_threads Tests that there's no internal process constrain on threaded cgroups. You can add threads/processes on a parent with a controller enabled. - test_cgcore_parent_becomes_threaded Tests that when a child becomes threaded the parent type becomes domain threaded. - test_cgcore_invalid_domain In a situation like: A (domain threaded) - B (threaded) - C (domain) it tests that C can't be used until it is turned into a threaded cgroup. The "cgroup.type" file will report "domain (invalid)" in these cases. Operations which fail due to invalid topology use EOPNOTSUPP as the errno. - test_cgcore_populated In a situation like: A(0) - B(0) - C(1) \ D(0) It tests that A, B and C's "populated" fields would be 1 while D's 0. It tests that after the one process in C is moved to root, A,B and C's "populated" fields would flip to "0" and file modified events will be generated on the "cgroup.events" files of both cgroups. Signed-off-by: Claudio Zumbo <claudioz@fb.com> Cc: Shuah Khan <shuah@kernel.org> Cc: Roman Gushchin <guro@fb.com> Cc: Tejun Heo <tj@kernel.org> Cc: kernel-team@fb.com Acked-by: Tejun Heo <tj@kernel.org> Reviewed-by: Roman Gushchin <guro@fb.com> Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>
Diffstat (limited to 'tools/testing/selftests/cgroup/cgroup_util.c')
1 files changed, 8 insertions, 0 deletions
diff --git a/tools/testing/selftests/cgroup/cgroup_util.c b/tools/testing/selftests/cgroup/cgroup_util.c
index 1e9e3c470561..1c5d2b2a583b 100644
--- a/tools/testing/selftests/cgroup/cgroup_util.c
+++ b/tools/testing/selftests/cgroup/cgroup_util.c
@@ -229,6 +229,14 @@ retry:
return ret;
+int cg_enter_current(const char *cgroup)
+ char pidbuf[64];
+ snprintf(pidbuf, sizeof(pidbuf), "%d", getpid());
+ return cg_write(cgroup, "cgroup.procs", pidbuf);
int cg_run(const char *cgroup,
int (*fn)(const char *cgroup, void *arg),
void *arg)